Acoustic intensity field of a curved array (focused beam). The CMM layers are placed in front of the aberrating layers. Three cases are presented: (a) Aberrating layers only. (b) Homogeneous medium. (c) With CMM and aberrating layers. The intensity fields in (b) and (c) indicate the validity of the multiple aberrating layers approach.  An Anisotropic Complementary Acoustic Metamaterial for Cancelling out Aberrating Layers.  Jing et al 2014.
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